VMWare Clariion Disk IO Tests Ubuntu...

VMWare Clariion Disk IO Tests  Ubuntu/Redhat

ESX version 3.5 Update 3
Clariion CX4-480 RAID 5 of 300G 15K spindles (5 spindles per RAID Group)
4GB backplane and Fibre Channel throughout
 
On all servers:
Copied the 618MB iso image to /dev/shm (RAMdisk)
dd if=iso1 of=/dev/shm/iso1 bs=65536 oflag=sync 
 
Ubuntu 8.0.4   2.6.24-23-server with Raw Mapped Luns and a 512 offset no LVM:
Write the iso image to SAN from RAMdisk  with the oflag=sync to prevent IO buffering
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1:  106 MB/s
Run 2:  114 MB/s
Run 3:  116 MB/s
Run 4:  112 MB/s
Run 5:  94.5 MB/s
 
Ubuntu 8.0.4   2.6.24-23-server  with Raw Mapped Luns and no offset no LVM:
dd if=iso1 of=/home/test1/iso1 bs=8388608 oflag=sync
Run 1:  110 MB/s
Run 2:  114 MB/s
Run 3:  111 MB/s
Run 4:  118 MB/s
Run 5:  116 MB/s
 
 
Ubuntu 8.0.4 2.6.24-23-server  with vmdk and LVM:
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1:  56 MB/s
Run 2:  51 MB/s
Run 3:  105 MB/s
Run 4:  129 MB/s
Run 5:  116 MB/s
 
RHEL 5.2  2.6.18-128.1.1.el5 with vmdk and LVM:
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1:  49 MB/s
Run 2:  52 MB/s
Run 3:  105 MB/s
Run 4:  113 MB/s
Run 5:  114 MB/s
 
RHEL 4 Update 7  2.6.9-78.0.13.ELsmp with vmdk and LVM:
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1:  34 MB/s
Run 2:  32 MB/s
Run 3:  36 MB/s
Run 4:  34 MB/s
Run 5:  30 MB/s
Physical x3755 with 2 Qlogic 4GB HBA's boot-from-san performance
 
Ubuntu 8.0.4 2.6.24-23-server with LVM and no offset
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1:  152 MB/s
Run 2:  150 MB/s
Run 3:  134 MB/s
Run 4:  144 MB/s
Run 5:  162 MB/s
 
 
RHEL 5.2  2.6.18-128.1.1.el5 with LVM and no offset
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1:  100 MB/s
Run 2:  91 MB/s
Run 3:  82 MB/s
Run 4:  92 MB/s
Run 5:  91 MB/s
 
RHEL 5.2  2.6.18-128.1.1.el5 local disk
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1:  55 MB/s
Run 2:  54 MB/s
Run 3:  55 MB/s
Run 4:  56 MB/s
Run 5:  56 MB/s